definition of ph
16a0b4f056378a32e96692d1dc6649f3
What does PHstand for? pH - (from potential of Hydrogen) the logarithm of the reciprocal of hydrogen-ion concentration in gram atoms per liter; provides a measure on a scale from 0 to 14 of the acidity or alkalinity of a solution (where 7 is neutral and greater than 7 is more basic and less than 7 is more acidic);
55b72b65aab8d4c9eb0f87df44f0fcc8
pH In chemistry, pH (/piːˈeɪtʃ/) is a numeric scale used to specify the acidity or alkalinity of an aqueous solution. It is the negative of the logarithm to base 10 of the activity of the hydrogen ion. Solutions with a pH less than 7 are acidic and solutions with a pH greater than 7 are alkaline or basic.Pure water is neutral, being neither an acid nor a base. Contrary to popular belief, the pH value can be less than 0 or greater than 14 for very strong acids and bases respectively.ure water is neutral. When an acid is dissolved in water, the pH will be less than 7. When a base, or alkaline, is dissolved in water, the pH will be greater than 7. A solution of a strong acid, such as hydrochloric acid, at concentration 1 mol dm −3 has a pH of 0.
21fc39f82ef53c5ce0805e8c31f056c3
pH In chemistry, pH (/piːˈeɪtʃ/) is a numeric scale used to specify the acidity or alkalinity of an aqueous solution. It is the negative of the logarithm to base 10 of the activity of the hydrogen ion. Solutions with a pH less than 7 are acidic and solutions with a pH greater than 7 are alkaline or basic.Pure water is neutral, being neither an acid nor a base.Contrary to popular belief, the pH value can be less than 0 or greater than 14 for very strong acids and bases respectively.ure water is neutral. When an acid is dissolved in water, the pH will be less than 7. When a base, or alkaline, is dissolved in water, the pH will be greater than 7. A solution of a strong acid, such as hydrochloric acid, at concentration 1 mol dm −3 has a pH of 0.
043aa8a4761e1b54c004d250bae3886c
- The abbreviation pH stands for potential hydrogen. This abbreviation is always spelled with a small “p” and a capital “H.” In scientific terms, what pH would stand for is ability of molecules to attract hydrogen ions. An acidic molecule would have a low ability to attract hydrogen ions, while an alkaline molecule would have a high ability to attract hydrogen ions. The pH of a solution is measured on a scale from zero to 14.
194353a961476dd1bc202796e1e37ffe
pH Definition - basic (alkaline) and acidic pH values are calculated in powers of 10. The hydrogen ion concentration of a solution with pH 1.0 is 10 times larger than the hydrogen concentration in a solution with pH 2.0. The larger the hydrogen ion concentration, the smaller the pH. when the pH is above 7 the solution is basic (alkaline)
bf7011c99a474bebf2e8db41afd41828
- In chemistry, a measure of the hydrogen ion concentration of a solution. The degree of acidity or alkalinity of a substance is expressed in a pH value. A solution that is neither acid nor alkaline has a pH of 7. Increasing acidity is expressed as a number less than 7, and increasing alkalinity as a number greater than 7.
96ed82fe3f7e8dce3be2c8789cf2dd1c
pH Definition and Equation in Chemistry Chemistry Glossary Definition of pH. pH is a measure of hydrogen ion concentration in a water-based solution. Todd Helmenstine. Anne Marie Helmenstine, Ph.D.
78a17d98b2745c4f0d4749daa2628306
- pH: Definition and measurement units. pH is a measure of how acidic/basic water is. The range goes from 0 - 14, with 7 being neutral. pHs of less than 7 indicate acidity, whereas a pH of greater than 7 indicates a base. pH is really a measure of the relative amount of free hydrogen and hydroxyl ions in the water. Water that has more free hydrogen ions is acidic, whereas water that has more free hydroxyl ions is basic.
2f0df8fe00f88b62548195e7115b26a2
acidic Any of a class of compounds that form hydrogen ions when dissolved in water, and whose aqueous solutions react with bases and certain metals to form salts. Acids turn blue litmus paper red and have a pH of less than 7. Their aqueous solutions have a sour taste. Compare base.
511fd829305ed1aaa6f6803e97a20e67
ph A numerical measure of the acidity or alkalinity of a solution, usually measured on a scale of 0 to 14. Neutral solutions have a pH of 7, acidic solutions have a pH lower than 7, and alkaline solutions have a pH higher than 7.
a83b55e7285178d5e40dc96b0e9e6708
Acidic solution The abbreveation used for potential hydrogen. pH represents the quantity of hydrogen ions. pH scale A measure of the acidity and alklinity of a substance; the ph scale has a range of 0 to 14, with 7 being neutral. A pH below 7 is an acidic solution; a pH above 7 is an alkaline solution. Physical change A change in the form or physical properties of a substance, without a chemical reaction or the creation of a new substance
bdeb4a9cd34b27137da5cb13d1fd9687
PH Because of uncertainty about the physical significance of the hydrogen ion concentration, the definition of the pH is an operational one—i.e., it is based on a method of measurement.
fae09dbc8459c717b1f1e750f84f4b2e
pH Definition of pH for English Language Learners. : a number between 0 and 14 that indicates if a chemical is an acid or a base.
63aaa05c666025f6562c32f26a5810a0
- The Simple Definition. pH is a logarithmic measure of hydrogen ion concentration, originally defined by Danish biochemist S ren Peter Lauritz S rensen in 1909 [ 1 ]. pH = -log[H+]. where log is a base-10 logarithm and [H+] is the concentration of hydrogen ions in moles per liter of solution. According to the Compact Oxford English Dictionary, the p stands for the German word for power, potenz, so pH is an abbreviation for power of hydrogen [ 2 ].
97444b0cbc803b1a436ac2c29f51e726
How much does FPL pay you per kwH? If you use electric in the night and owe them for 400 kwh at the end of the month, but supply them with 300 kwh during the day, then you only have to pay them for 100 kwh. If your system produces more energy : than you need, the excess power is sold back to FPL’s grid.
cb8bde32ea2f580a88fdfa557ae0045f
ph A numerical measure of the acidity or alkalinity of a solution, usually measured on a scale of 0 to 14. Neutral solutions (such as pure water) have a pH of 7, acidic solutions have a pH lower than 7, and alkaline solutions have a pH higher than 7. The pH of lemon juice is 2.4; that of household ammonia is 11.5. The normal pH for human blood is 7.4.
53fc3d7431067c8e4df3daa2538714c8
- pH - (from potential of Hydrogen) the logarithm of the reciprocal of hydrogen-ion concentration in gram atoms per liter; provides a measure on a scale from 0 to 14 of the acidity or alkalinity of a solution (where 7 is neutral and greater than 7 is more basic and less than 7 is more acidic); pH scale.
0ca949b9b770ca8ef6ecd04b89c65be5
"What Does ""pH"" Stand for in a Chemical Formula?" What pH Stands For. The term pH is used to mean the power of hydrogen within the solution. There is some debate within the scientific community of where the p comes from, but it now is indicative of the word power..
e34bdbad02986d138deaa67302b2a3b8
pH pH = -log. The measurement of the pH of a sample can be done by measuring the cell potential of that sample in reference to a standard hydrogen electrode, as in the accepted procedure for measuring standard electrode potentials.xamples of pH Values. The pH of a solution is a measure of the molar concentration of hydrogen ions in the solution and as such is a measure of the acidity or basicity of the solution.
1e714697a5ac8ce004d7383637fde4b6
What does PHstand for? Noun. 1. pH scale - (from potential of Hydrogen) the logarithm of the reciprocal of hydrogen-ion concentration in gram atoms per liter; provides a measure on a scale from 0 to 14 of the acidity or alkalinity of a solution (where 7 is neutral and greater than 7 is more basic and less than 7 is more acidic); pH.
ea2fe2dbae3fb343fa90006acd5574c8
- Medical Definition of Blood pH. Blood pH: The acidity or alkalinity of blood. The pH of any fluid is the measure of the hydrogen ion (H-) concentration. A pH of 7 is neutral. The lower the pH, the more acidic the blood. A variety of factors affect blood pH including what is ingested, vomiting, diarrhea, lung function, endocrine function, kidney function, and urinary tract infection.
6144d77c7559ea8ae6fe76d8ffcfed77
pH and Buffers A buffer is any substance that minimizes change in the pH of a solution. Most buffers consist of a combination of a weak acid and the weak base, where the base is the anion remaining after the weak acid dissociates (separates) to release H + ions.
c66ef840776e73334cecd503fb66ec56
- Syllabification: (pH) | [chemistry] | a figure expressing the acidity or alkalinity of a solution on a logarithmic scale on which 7 is neutral, lower ... (23 of 82 words, 3 definitions) oxforddictionaries​.com​/definition​/american english​/p​H.
647385ff53f0fee2ed14a85758403e54
Acidic, Basic & Neutral Solutions: Determining pH The pH Scale. But the words acid, base, and neutral are pretty vague. In science, we like to put numbers to things. And, we have a way of doing that: it's called pH. pH is a measure of how acidic or basic a substance is. A pH of 0 is the most acidic, a pH of 14 is the most basic, and a pH of 7 is perfectly neutral.
4d44993a77f2d2a7e5d1a7cb7f82473f
pH -- Water properties pH: Definition and measurement units. pH is a measure of how acidic/basic water is. The range goes from 0 - 14, with 7 being neutral. pHs of less than 7 indicate acidity, whereas a pH of greater than 7 indicates a base. pH is really a measure of the relative amount of free hydrogen and hydroxyl ions in the water.
97b44721244d7aae36cba12393898a3d
- pH the measurement of acidity or alkalinity in aqueous solutions. pH is the scale of measurement of acidity or alkalinity in aqueous (water based) solutions. A neutral solution such as pure water has a pH of 7. Solutions with a lower pH are termed acidic and solutions with a higher pH are termed alkaline. pH ranges from highly acidic pH 0 to highly alkaline pH 14. The pH of the human eye is about 7.5.